Swift 6.4 unifies building across Linux, macOS, Windows

Swift 6.4 has been released. Swift Build is now the default build engine for Swift Package Manager, unifying the build process on Linux, macOS, and Windows. SBOM generation, a VS Code extension, and LLDB debugger improvements were added.

• Swift Build became the default build engine for SwiftPM
• Unified build process for Linux, macOS, and Windows
• SBOM generation in SPDX and CycloneDX formats
• LLDB now references the module instead of embedding it